I had a sonnics which worked perfectly on my mac and he can not copy files from a formatted hard drive verbatim enfat 32 to sonnics formatted in Fat 32: Why ?? plus it comes with a usb cable has two plugs which requires states to plug part of the cable on power (which was not the case of the former). no explanation or instructions (which seems useless usb 2); back to Amazon, which is always very responsive to feedback ... shame